9 to 25V x 100 mA regulator (CB8825E)

This small voltage regulator was found in a 1969 EEE. More powerful transistors can be used to obtain a higher output current.

| Clique na imagem para ampliar |

1 Hz Low Pass Filter (CB12563E)
In the figure we have a second order filter with very high input impedance, using an operational...
Telephone control in use (CB24431E)
This circuit for old analog telephones is from period documentation. It controls a relay that can...
Monostable LM3900 (CB13833E)
The circuit shown is from a 1974 integrated circuit manual. In it we have the monostable...